This was a bit more messed up than just "not working on iOS". I was on Windows 11, watched most of the Wednesday stream, nothing counted towards progress, couldn't claim the forma. Watched the entire Thursday stream on Windows 11 again, nothing was counting, gave up on it but much to my luck kept it running. Looked at it again at 9pm (an hour after the stream is supposed to end), an lo and behold I could claim things, according to Twitch I got 1 claim for 2 forma from watching Wednesday, 2 claims for 1 forma each for Thursday. Log into the game, I get 3 forma.
I'm not complaining, I got the 3 that I was supposed to, but I'm getting a headache trying to wrap my head around the math.